The spread of non-native species continues to increase around the globe, making it important we understand the dynamics of the resulting communities in which non-natives comprise a high percentage of the total fauna. As non-native species continue to invade, the resulting community may become saturated, at which point limited resources would prevent colonization by new non-native species and native or already established species might decline. As the global hotspot for non-native reptiles and amphibians, South Florida’s herpetofaunal community has a higher probability of having reached the saturation point than any other comparable system. Surveys conducted in Miami-Dade County in 2017 demonstrated that non-native species already dominated both native and non-native habitat types and provided a baseline to examine dynamic changes such as signatures of community saturation or negative impacts on native species. In 2022, we replicated the surveys from 2017 at the same 30 sites. We found that non-native richness and abundance have increased significantly (19% and 33% increase in overall alpha diversity and abundance, respectively), showing no signs of community saturation. We also found no correlation between these non-native increases and decreases in either native species richness or abundance. Non-native species richness increased more rapidly at sites dominated by non-native habitats, with two rock-loving species, Agama picticauda and Leiocephalus carinatus, standing out as the most rapidly spreading non-native herpetofauna. Our findings demonstrate that open niche space allows the continued expansion of non-native herpetofaunal populations even in the highly invaded community of Miami-Dade County, and that protection of native habitat may help slow the spread of non-native species.